That depends on the number of entities you need to render. If it's a lot, you probably want to group them by location for faster culling. If it's not many at all, an ArrayList<Entity> will probably work great.

I imagine it's the same as for a single player RPG except that there's probably more entities. This is something that would be handled on the client computers. I imagine the server would handle things like ai and processing the players' actions, not rendering.

I imagine it's the same as for a single player RPG except that there's probably more entities. This is something that would be handled on the client computers. I imagine the server would handle things like ai and processing the players' actions, not rendering.

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